package com.ds.common.org.expression.person;

import java.util.Stack;

import com.ds.common.expression.ParseException;
import com.ds.common.expression.function.Function;
import com.ds.org.Person;

 /** 
 * <p>Title: JDSORG组织机构中间件</p>
 * <p>Description:
 * 3.1.27.	判断某个人是否在一些人范围之内<br>
   Boolean IsPersonInPersons(Person person, Person[] persons)<br>
   参数：persons - 人员范围<br>
   person - 指定的人员<br>
   返回值：如果此人员在人员范围之内返回True，否则返回False<br>
 </p>
 * <p>Copyright: jds Copyright (c) 2003-2008</p>
 * <p>Company: www.justdos.net</p>
 * @author lxl
 * @version 2.0
 */
public class IsPersonInPersons extends Function {
	public IsPersonInPersons() {
		numberOfParameters = 2;
	}

	public void run(Stack stack) throws ParseException
	{
		checkStack(stack); // check the stack
		Object param2 = stack.pop();
		Object param1 = stack.pop();
		stack.push(perform(param1, param2));
	}

	protected Boolean perform(Object param1, Object param2) throws ParseException {
		if (param1 == null || param2 == null) {
			return Boolean.FALSE;
		}
		if (param1 instanceof Person && param2 instanceof Person[]) {
			Person person = (Person)param1;
			String personId = person.getID();
			if(personId == null) {
			    return Boolean.FALSE;
			}
			Person[] persons = (Person[])param2;
			for(int i=0; i<persons.length; i++) {
			    if(person.getID().equalsIgnoreCase(persons[i].getID())) {
			        return Boolean.TRUE;
			    }
			}
			return Boolean.FALSE;
		}
		throw new ParseException("Invalid parameter type in:" + this.getClass().getName() + ", param1 is " + param1.getClass().getName() + ", param2 is " + param2.getClass().getName());
	}
}
